Thanks for sharing your opinions.
I think some of it has to due with Zombies being on offensive and Plants being on defence. (Gnomes Bomb, Team Vanquish, of course are different). Since I mainly only play Garden-vs-Graveyards my experiences are skewed towards that.
With an exception for the Berry Shooter; I felt things were pretty balanced given the wide variance between all 8 classes and characters. Perfect? of course not, you're always going to have the weaker and stronger characters; almost unavoidable I think especially with a game with so much going on in the character department.
There is a PC patch coming someday, not sure exact date. It will have PC exclusive fixes/tweaks and also what the Xbox got.
I believe some of the balance fixes might already be in the PC version from launch, I'm not entirely sure because I didn't play the Xbox version.
